Leviticus 15:24

Female Bodily Discharges

²³ And if any thing was on the bed or on any thing upon which she sat, he that touches it shall be unclean until the evening. ²⁴ If a man actually lies with her so that her menstrual impurity is on him, he shall be unclean seven days, and every bed on which he lies shall be unclean. ²⁵ And the woman when she has an issue of her blood many days out of the time of her separation or if it runs beyond the time of her separation, all the days of the issue of her uncleanness shall be as the days of her separation: she shall be unclean.

Sexual Relations

Leviticus 20:18

And if a man shall lie with a woman having her menstruation and shall uncover her nakedness, he has discovered her fountain, and she has uncovered the fountain of her blood; both of them shall be cut off from among their people.

Leviticus 18:19

Also thou shalt not approach unto a woman to uncover her nakedness as long as she is separated for her uncleanness.

Ezekiel 18:6

that he does not eat upon the mountains, neither lift up his eyes to the idols of the house of Israel, neither defile his neighbour's wife, neither come near to the menstruous woman,

Leviticus 15:33

and of her that is suffering her menstruation, and of the one that has an issue, male or female, and of the man that lies with an unclean woman.

Ezekiel 22:10

In thee they have discovered their fathers' nakedness; in thee they have forced the unclean menstruous woman.

1 Thessalonians 5:22

Separate yourselves from all appearance of evil.

Hebrews 13:4

Let marriage be honourable in all and the bed undefiled; but the fornicators and adulterers God will judge.

1 Peter 2:11

Dearly beloved, I beseech you as strangers and pilgrims, abstain from the carnal desires which war against the soul